fixed bug: dublicate tasksDecision produces new tasks
Add HazelcastConfigBackend and set it in HazelcastBackendBundle.
Merge branch 'feature/hazelcast-backend'
Implements TaskServer on hazelcast version 2.
Merge branch 'feature/hazelcast-backend'
HazelcastTaskServer without queues
Remove unnecessary my HazelcastTaskServer.
Merge branches 'develop' and 'research/hazel_mongo' of https://github.com/taskurotta/taskurotta into research/hazel_mongo

Conflicts:
	wf-backend-hz/src/main/java/ru/taskurotta/backend/hz/queue/HztQueueBackend.java
	wf-dropwizard-assemble/wf-dropwizard-hz-poc/src/main/resources/context/context.xml
	wf-example/src/main/resources/ru/taskurotta/example/calculate/wf-config-jersey.yml